Scale Finder for Piano and Guitar
This scale finder lets you build any musical scale, see its notes on a piano keyboard and a guitar fretboard, and hear how it sounds. Pick a root note and a scale type, and the notes, intervals, formula, and related chords update instantly.
It is built for guitarists, pianists, songwriters, and music students — whether you are learning your first Major scale or exploring exotic modes. Compare two scales side by side, switch between sharp and flat spelling, and play each note to train your ear.
How to Use the Scale Finder
Pick a root note
Tap one of the 12 note buttons (C, C#, D, up to B) to set the starting note. Use the sharp (♯) and flat (♭) toggle to choose how the notes are spelled.
Choose a scale type
Select a scale from the dropdown, grouped into Common, Pentatonic / Blues, Modes, and Other. The piano, fretboard, and information panels refresh the moment you pick one.
Explore the views
Read the scale notes, formula, intervals, and semitones, see the highlighted keys and fret positions, and check the diatonic chords. Click any note to hear its pitch.
Play the scale
Press Play to hear the full scale ascending then descending, with each note highlighted as it sounds. Set the tempo to Slow, Medium, or Fast.
Compare two scales
Open the Compare tab, set a root and type for Scale A and Scale B, and see which notes they share and which are unique to each.
Features
20+ Scale Types
Build Major, Natural, Harmonic and Melodic Minor, pentatonics, blues, the seven modes, whole tone, diminished, chromatic, and more.
Interactive Piano
A 2-octave keyboard highlights every scale note, with the root in an accent color. Click any key to hear it.
Guitar Fretboard
A full 6-string, 15-fret board in standard tuning (E A D G B E) maps every scale position, with marker dots to keep you oriented.
Audio Playback
Hear single notes by clicking them, or play the whole scale up and down, with notes highlighted across every view in real time.
Adjustable Speed
Choose Slow, Medium, or Fast playback to study a scale carefully or run through it at performance tempo.
Fretboard Labels
Switch fret markers between note names, scale degrees (1, 2, b3...), or interval names (P1, M2, m3...) for theory and ear training.
Scale Information
See the notes, formula, the Whole/Half step pattern, and the exact semitone distance of each note from the root.
Diatonic Chords
For 7-note scales, view the triad built on each degree with its Roman numeral, name, and quality. Click a card to hear the chord.
Scale Comparison
Place two scales side by side and color-coded tags show which notes are shared and which belong only to each scale.
Sharp / Flat Toggle
Switch enharmonic spelling between sharps (♯) and flats (♭), and the whole interface updates at once.
Frequently Asked Questions
How does a scale finder work?
You pick a root note and a scale type, and the tool applies that scale's interval pattern to your root to work out every note. It then highlights those notes on the piano and guitar fretboard and lists the formula, intervals, and related chords.
How do I find out what scale a song is in?
List the notes the melody and chords use, then try matching root notes and scale types here until the highlighted notes line up with what you hear. The Compare tab helps when two scales look close — for example, telling a relative major and minor apart.
Do I need to know music theory to use it?
No. Pick a root note and a scale and the tool shows and plays the result for you. The formula, interval, and degree labels are there if you want to go deeper, but they are optional.
What is the difference between a scale and a key?
A scale is an ordered set of notes built from a root, like C Major. A key is the broader tonal context a piece is written in, centered on that scale's root and chords. The same scale can describe many pieces, while a key also implies how the music resolves to its home note.
What is the difference between a scale and a mode?
A mode is a scale derived from the degrees of a parent scale. The seven modes (Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian, Locrian) all come from the Major scale but start on different degrees, so each has its own interval pattern and character. You can select any of them from the Modes group.
Why do some scales not show diatonic chords?
Diatonic chord analysis applies to 7-note scales that follow traditional harmonic patterns. Scales with fewer notes (pentatonic with 5, blues with 6) or more notes (diminished with 8, chromatic with 12) do not fit the standard chord-building pattern, so the chord panel is hidden for those types.
Can I use this for guitar practice?
Yes. The fretboard shows every position where the scale falls in standard tuning across 15 frets. Click a fret to hear the note and check your fingering, and switch the labels to Degrees or Intervals to learn the patterns up the neck.
How is the audio generated?
Sound is synthesized in your browser with the Web Audio API — no audio files are downloaded or streamed. Each note is generated at the correct frequency for standard A4 = 440 Hz tuning, with a natural attack and decay.
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